-LRB- CNN -RRB- -- The CEO of popular messaging app Snapchat is apologizing after a set of filthy e-mails he wrote several years ago to his fraternity brothers at Stanford University was leaked publicly this week .

In the e-mails , acquired by Gawker 's Valleywag blog , Evan Spiegel encourages fellow Kappa Sigma members to get sorority women drunk enough to have sex , mocks another fraternity by suggesting its members are gay and refers to a different group of sorority members as `` sororisluts . ''

`` Hope at least six girl -LSB- s -RSB- -LSB- performed a sex act on you -RSB- last night because that did n't happen for me , '' he wrote in one e-mail after a fraternity party , according to the Gawker blog .

In another , the blog says , he jokes that the point of a laser-tag outing was to `` shoot lazers at fat girls . ''

In a written response sent to CNN by Snapchat , Spiegel , now 23 , apologized for the e-mails .

`` I 'm obviously mortified and embarrassed that my idiotic e-mails during my fraternity days were made public , '' he said . `` I have no excuse . I 'm sorry I wrote them at the time and I was a jerk to have written them . They in no way reflect who I am today or my views towards women . ''

A Snapchat spokeswoman told CNN that Spiegel had no further comment .

In other messages that were screen-grabbed onto the Gawker blog , Spiegel described a party `` shopping list '' that included `` 3 kegs , 5 ... plastic shot glasses , 1 ounce of marijuana , 1 kilo of blow -LRB- cocaine -RRB- . ''

In another , he writes , `` I 'll roll a blunt for whoever sees the most -LRB- breasts -RRB- tonight , '' according to the blog .

Some of the messages were too sexually explicit for CNN to publish .

Snapchat is a mobile messaging app popular with teens and young adults . It lets users trade photos and videos that disappear after a few seconds . Spiegel created Snapchat along with fraternity brother Bobby Murphy while attending Stanford . He left the university in 2012 , shortly before finishing his degree , to focus on Snapchat .

A third Kappa Sigma member , Reginald `` Reggie '' Brown IV , is suing Snapchat , saying he was the one who came up with the app 's concept of disappearing messages and designed its logo but was omitted from the launch of the company . It 's now valued at around $ 4 billion .

Spiegel has denied the lawsuit 's allegations .

Spiegel and Murphy founded their company as Picaboo in July 2011 and later changed its name to Snapchat . The app , which developed a reputation early in its history as a tool for sharing sexual images , is estimated to have more than 30 million users .

Snapchat claims its users send more than 700 million photos and videos a day . Snapchat reportedly turned down a $ 3 billion acquisition offer from Facebook last fall .

Time magazine last month named Spiegel and Murphy among its 100 Most Influential People of 2014 .

Spiegel 's leaked e-mails may be seen as yet another example of a `` brogrammer '' culture in Silicon Valley and the male-dominated tech industry , where some female employees have complained about sexist comments and a lack of respect from their male co-workers .

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Snapchat 's CEO apologizes for crude e-mails he sent while at Stanford

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The messages insult women and encourage getting them drunk for sex

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Evan Spiegel , 23 , says he 's `` mortified '' by the e-mails

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Snapchat is a photo-based messaging app with more than 30 million users